CN109096434A - A kind of triazole type molecular blotting polymer microsphere and its preparation method and application - Google Patents

A kind of triazole type molecular blotting polymer microsphere and its preparation method and application Download PDF

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CN109096434A
CN109096434A CN201810890894.4A CN201810890894A CN109096434A CN 109096434 A CN109096434 A CN 109096434A CN 201810890894 A CN201810890894 A CN 201810890894A CN 109096434 A CN109096434 A CN 109096434A
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triazole
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顾丽莉
李志君
韩毅
彭建
陶军
孔光辉
师君丽
吴玉萍
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Kunming University of Science and Technology
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Abstract

The present invention provides a kind of preparation methods of triazole type molecular blotting polymer microsphere, belong to molecularly imprinted polymer technical field, the following steps are included: carrying out self assembly after ultrasound under oxygen-free environment after triazole class compounds template molecule, function monomer and pore-foaming agent are mixed, prepolymerization is carried out after self assembly mixed liquor is mixed with acrylic ester cross-linking agent, azo-initiator, polymerization reaction will be carried out under the conditions of earthquake after the heating of obtained prepolymerization liquid, obtains polymer;By the triazole class compounds template molecule elution in obtained polymer, triazole type molecular blotting polymer microsphere is obtained.Molecular blotting polymer microsphere particle size distribution prepared by the present invention is single, and has good specific adsorption ability to template molecule and its analogue.

Description

A kind of triazole type molecular blotting polymer microsphere and its preparation method and application
Technical field
The present invention relates to molecularly imprinted polymer technical field, in particular to a kind of triazole type molecular blotting polymer microsphere And preparation method thereof.
Background technique
Triazole bactericidal agent refers to the compound containing 1,2,4- triazole ring, and due to having, less toxic, absorbability is strong, the lasting period The advantages that long, is widely used in the prevention and treatment of the pest and disease damages such as water fruits and vegetables, paddy.Phillips McDougall was to 2015 The important preceding 15 fungicide sales volumes in the whole world are counted, wherein including 5 kinds of triazole bactericidal agents, it is seen that it is importantly Position.But with the extensive use of triazole pesticide, residue problem in agricultural product and environment also gradually causes the weight of people Depending on.
Molecular imprinting technology, which refers to, prepares a kind of macromolecule for capableing of specific recognition target molecule and its analogue The technology of synthetic material, in recent years, this technology have obtained certain in the analysis of triazole bactericidal agent pesticide trace residue Research and application.Xu Yongxin etc. has invented a kind of triazole pesticide molecular blotting polymer microsphere solid-phase extraction column and its application Method, using triazolone as template molecule, methacrylic acid be function monomer, trimethylol-propane trimethacrylate is crosslinking Agent, azodiisobutyronitrile are to remove template molecule after initiator reacts in atent solvent, obtain point with certain adsorptivity Sub- imprinted polymer microballoon.But the polymer partial size of this method preparation is larger, at 2 μm or so, specific adsorption effect is poor.
Summary of the invention
In view of this, it is an object of that present invention to provide a kind of triazole type molecular blotting polymer microsphere and preparation method thereof, Triazole type molecular blotting polymer microsphere granularity provided by the invention is small, and particle diameter distribution is single, and specific adsorption effect is good.
The present invention provides a kind of preparation methods of triazole type molecular blotting polymer microsphere, comprising the following steps:
1) it is carried out after ultrasound under oxygen-free environment after mixing triazole class compounds template molecule, function monomer and pore-foaming agent Self assembly obtains self assembly mixed liquor;
2) it is carried out after mixing the self assembly mixed liquor that step 1) obtains with acrylic ester cross-linking agent, azo-initiator Prepolymerization obtains prepolymerization liquid;The prepolymerized temperature is 20~40 DEG C;
3) polymerization reaction is carried out after the prepolymerization liquid that step 2) obtains heating up, obtains polymer;The heating Rate is 0.5~1.2 DEG C/min, and the polymerization temperature is 35~60 DEG C;
4) the triazole class compounds template molecule elution in the polymer for obtaining step 3) obtains triazole type molecular engram Polymer microballoon;
It is carried out under the conditions of the polymerization reaction earthquake in prepolymerization and the step 3) in the step 1).
Preferably, in the step 1) triazole class compounds template molecule be triazolone, nitrile bacterium azoles, Tebuconazole, hexaconazole, Olefin conversion, propiconazole, tricyclazole, glyoxalin or Flusilazole.
Preferably, function monomer is acrylic acid, α-methacrylic acid, trifluoromethyl acrylate or propylene in the step 1) Amide.
Preferably, pore-foaming agent is chloroform, toluene, acetonitrile or methylene chloride in the step 1).
Preferably, the amount ratio of triazole class compounds template molecule, function monomer and pore-foaming agent is in the step 1) 1mol:2~6mol:30~60ml.
Preferably, the temperature of self assembly is 4~30 DEG C in the step 1), and the time of the self assembly is 2~12h.
Preferably, acrylic ester cross-linking agent is ethylene glycol dimethacrylate or trihydroxy methyl third in the step 2) Alkane trimethyl acrylic ester.
Preferably, azo-initiator is azodiisobutyronitrile or azobisisoheptonitrile in the step 2).
Preferably, acrylic ester cross-linking agent, azo-initiator and triazole class compounds template point in the step 2) The mass ratio of son is 4~20:1:1.
Preferably, the concussion condition is provided by constant temperature oscillator, and the revolving speed of the isothermal vibration device is 50~150rpm.
The present invention also provides the triazole bactericidal agent molecular blotting polymer microsphere that above-mentioned preparation method is prepared, institutes State polymer microballoon granularity be 190~220nm, the size distribution of the polymer microballoon is single, average particle size be 198nm~ 203nm。
The present invention also provides application of the above-mentioned polymer microballoon in the residual trace detection of triazole bactericidal agent agriculture.
Advantageous effects: the present invention causes precipitation polymerization process using heat, by self assembly, prepolymerization, polymerization process Triazole type molecular blotting polymer microsphere is prepared.Molecular blotting polymer microsphere grain diameter prepared by the present invention is small, grain Diameter distribution is single, and has good specific adsorption ability to triazole type template molecule and its analogue.Implement number of cases According to show triazole type molecular blotting polymer microsphere average grain diameter provided by the invention be 198nm~203nm.
2.4 are not less than to triazole type template molecule imprinting factor.
Detailed description of the invention:
Fig. 1 is the electron-microscope scanning figure of MIPs obtained in embodiment 1;
Fig. 2 is the particle size distribution figure of MIPs obtained in embodiment 1;
Fig. 3 is the Static Adsorption curve of MIPs obtained in embodiment 1;
Fig. 4 is spy of the MIPs and NIPs obtained in embodiment 1 to 9 kinds of triazole bactericidal agents and 2 kinds of non-triazole pesticides Opposite sex absorption figure;
Fig. 5 is the particle size distribution figure of MIPs obtained in embodiment 3;
Fig. 6 is the particle size distribution figure of MIPs obtained in embodiment 4.
Specific embodiment
The present invention provides a kind of preparation methods of triazole type molecular blotting polymer microsphere, comprising the following steps:
1) it is carried out after ultrasound under oxygen-free environment after mixing triazole class compounds template molecule, function monomer and pore-foaming agent Self assembly obtains self assembly mixed liquor;
2) it is carried out after mixing the self assembly mixed liquor that step 1) obtains with acrylic ester cross-linking agent, azo-initiator Prepolymerization obtains prepolymerization liquid;The prepolymerized temperature is 20~40 DEG C;
3) polymerization reaction is carried out after the prepolymerization liquid that step 2) obtains heating up, obtains polymer;The heating Rate is 0.5~1.2 DEG C/min, and the polymerization temperature is 35~60 DEG C;
4) the triazole class compounds template molecule elution in the polymer for obtaining step 3) obtains triazole type molecular engram Polymer microballoon;
It is carried out under the conditions of polymerization reaction earthquake in prepolymerization and step 3) in the step 2).
The present invention by triazole class compounds template molecule, function monomer and pore-foaming agent mix after after ultrasound under oxygen-free environment Self assembly is carried out, self assembly mixed liquor is obtained.
In the present invention, the triazole class compounds template molecule be preferably triazolone, nitrile bacterium azoles, Tebuconazole, hexaconazole, Olefin conversion, propiconazole, tricyclazole, glyoxalin or Flusilazole.
In the present invention, the function monomer is preferably acrylic acid, α-methacrylic acid, trifluoromethyl acrylate or propylene Amide.
In the present invention, the pore-foaming agent is preferably chloroform, toluene, acetonitrile or methylene chloride.
In the present invention, the amount ratio of the triazole class compounds template molecule, function monomer and pore-foaming agent is preferably 1mol:2~6mol:30~60ml, more preferably 1mol:3~5mol:45~55ml.
In the present invention, the frequency of the ultrasound is preferably 20~40kHz, more preferably 25~30kHz;The ultrasound Time is preferably 10~20min, more preferably 15min;The temperature of the ultrasound is preferably 20~30 DEG C, and more preferably 25 DEG C.
The present invention is preferably passed through nitrogen in ultrasonic procedure and provides oxygen-free environment.
In the present invention, the temperature of the self assembly is preferably 4~30 DEG C, more preferably 10~25 DEG C, most preferably 15 ~20 DEG C;The time of the self assembly is preferably 2~12h, more preferably 5~10h.
In the present invention, the template molecule and function monomer mainly pass through hydrogen bond action;Pore-foaming agent is solvent, to hydrogen bond Formation have a certain impact.
The sequence and method that the present invention mixes triazole class compounds template molecule, function monomer and pore-foaming agent be not special It limits, selects sequence and method well known to those skilled in the art.
After obtaining self assembly mixed liquor, the present invention is by obtained self assembly mixed liquor and acrylic ester cross-linking agent, azo Prepolymerization is carried out after the mixing of class initiator, obtains prepolymerization liquid;The prepolymerized temperature is 20~40 DEG C.
In the present invention, the acrylic ester cross-linking agent is preferably ethylene glycol dimethacrylate or trihydroxy methyl third Alkane trimethyl acrylic ester.
In the present invention, the azo-initiator is preferably azodiisobutyronitrile or azobisisoheptonitrile.
In the present invention, the acrylic ester cross-linking agent, azo-initiator and triazole class compounds template molecule The mass ratio of the material is preferably 4~20:1:1, more preferably 10~15:1:1.
In the present invention, the prepolymerized temperature is preferably 25~35 DEG C, and more preferably 30 DEG C;When described prepolymerized Between preferably 2~4h, more preferably 3h.
In the present invention, it is carried out under the conditions of the preferred earthquake of the prepolymerization.
In the present invention, the condition of swinging preferably is provided by constant temperature oscillator, and the revolving speed of the isothermal vibration device is preferably 50~150rpm, more preferably 80~120rpm, most preferably 100~110rpm.
The sequence and method that the present invention mixes self assembly mixed liquor with acrylic ester cross-linking agent, azo-initiator do not have There is particular determination, selects sequence and method well known to those skilled in the art.
After obtaining prepolymerization liquid, this hair carries out polymerization reaction after prepolymerization liquid heats up, and obtains polymer;Institute The rate for stating heating is 0.5~1.2 DEG C/min, and the temperature of the polymerization reaction is 35~60 DEG C.
In the present invention, the heating rate is preferably 0.8~1.0 DEG C/min.The present invention is warming up to polymeric reaction temperature Stop heating afterwards.
In the present invention, the temperature of the polymerization reaction is preferably 40~55 DEG C, and more preferably 45~50 DEG C;The polymerization The time of reaction is preferably 16~for 24 hours, more preferably 18~22h, most preferably 20h.
In the present invention, it is carried out under the conditions of the preferred earthquake of the polymerization reaction.
In the present invention, the concussion condition is preferably provided by constant temperature oscillator, and the revolving speed of the isothermal vibration device is preferred For 50~150rpm, more preferably 80~120rpm, most preferably 100~110rpm.
In the present invention, further preferably include standing to room temperature, centrifuge separation after the polymerization reaction, obtain polymer.
In the present invention, the centrifugal rotational speed of the centrifuge separation is preferably 10000~15000rpm, and more preferably 12000 ~14000rpm;The time of the centrifugation is preferably 5~15min, more preferably 7~10min.
In the present invention, solid phase, solid phase drying to obtain polymer are obtained after the centrifugation.
The present invention is not particularly limited the dry method of solid phase, selects drying means well known to those skilled in the art i.e. It can.
After obtaining polymer, the triazole class compounds template molecule elution in obtained polymer is obtained three by the present invention Azole molecular blotting polymer microsphere.
The present invention is preferably dried polymer before elution.
In the present invention, the temperature of the drying is preferably 35~40 DEG C, and the time of the drying is preferably 2~3h.
In the present invention, the eluant, eluent of the elution is preferably the mixed solution of methanol and acetic acid.
In the present invention, the volume ratio of the methanol and acetic acid is preferably 2~10:1, more preferably 5~9:1.
In the present invention, the elution carries out preferably in Soxhlet extractor.
In the present invention, the number of the elution is preferably until can't detect template molecule in the supernatant after eluting.
In the present invention, further preferably successively include washing after the elution, dry, obtain triazole type molecularly imprinted polymer Microballoon.
In the present invention, the detergent of the washing is preferably methanol.The present invention is not particularly limited the number of washing, Washing to polymer is neutrality.
In the present invention, the temperature of the drying is preferably 30~50 DEG C, and more preferably 40~45 DEG C;The present invention is to drying Time be not particularly limited, it is dry to constant weight.
In the present invention, the drying is preferably dried in vacuo.
The present invention also provides the triazole type molecular blotting polymer microsphere that above-mentioned preparation method is prepared, the polymerizations The granularity of object microballoon is 190~220nm, and the size distribution of the polymer microballoon is single, average particle size 200nm.
The present invention also provides above-mentioned triazole type molecular blotting polymer microspheres in the residual trace detection of triazole bactericidal agent agriculture In application.
In the present invention, it is preferred to successively carry out sample to be tested using triazole type molecular blotting polymer microsphere as adsorbent Solid Phase Extraction and UPLC-MS/MS detection.
In the present invention, the triazole bactericidal agent be preferably triazolone, nitrile bacterium azoles, Tebuconazole, hexaconazole, olefin conversion, Propiconazole, tricyclazole, glyoxalin or Flusilazole.
The present invention is not particularly limited the processing method of sample to be tested, selects method well known to those skilled in the art i.e. It can.
In the present invention, triazole type molecular blotting polymer microsphere is preferably packed into solid-phase extraction column by the Solid Phase Extraction In, it obtains carrying out Solid Phase Extraction by the solid-phase extraction column of adsorbent of triazole type molecular blotting polymer microsphere.
In the present invention, the mass volume ratio of the triazole type molecular blotting polymer microsphere and solid-phase extraction column is preferably 100mg:3mL.
In the present invention, the Solid Phase Extraction preferably successively includes pre-activate, activation, loading, elution and elution.
In the present invention, the preactivated pre-activate agent is preferably methanol.The present invention does not have the dosage of pre-activate agent Particular determination selects dosage well known to those skilled in the art.
In the present invention, the activator of the activation is preferably acetonitrile.The present invention does not have special limit to the dosage of activator It is fixed, select dosage well known to those skilled in the art.
In the present invention, the eluent of the elution is preferably the mixed liquor of first alcohol and water.The present invention does not have elution rate There is particular determination, selects elution rate well known to those skilled in the art.
In the present invention, the volume ratio of the first alcohol and water is preferably 8:1, and the water is preferably ultrapure water.
In the present invention, the eluent is preferably the mixed liquor of methanol and acetic acid.
In the present invention, the volume ratio of the methanol and acetic acid is preferably 9:1.
The present invention is not particularly limited the UPLC-MS/MS method detected, selects detection well known to those skilled in the art Method.
In the present invention, the detection limit of the triazole bactericidal agent is preferably 4.82~11.97ng/mL, more preferably 5.50~10.50ng/mL, more preferably 6.50~7.50ng/mL.
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention Content is not limited solely to the following examples.
Embodiment 1
Sequentially added in 100mL pyrex bottle 0.2mmol triazolone, 0.6mmol methacrylic acid (MAA) and 50mL acetonitrile is uniformly mixed, the logical N of ultrasound at 25 DEG C210min is placed on self assembly 10h in 25 DEG C of constant temperature gas bath oscillators, then 25mg azodiisobutyronitrile (AIBN) and 3mmol ethylene glycol dimethacrylate (EGDMA) is added, is uniformly mixed, leads to N210min is placed on 25 DEG C of thermostatic water bath vibrator prepolymerization 2h, temperature is then warming up to 40 DEG C with 0.5 DEG C/min, polymerization 18h.After polymerization, stands to room temperature and outwell supernatant then with supercentrifuge (revolving speed 10000rpm) isolating polymer Liquid, be put into Soxhlet extractor after object to be polymerized is dry, use methanol: acetic acid=6:1 (V/V) is eluted as eluant, eluent repetitive cycling Template molecule, until supernatant can't detect triazolone on UPLC.Again with methanol solution washing copolymer, until polymerization Object is in neutrality, and polymer is then put into 40 DEG C of vacuum ovens dryings to constant weight, it is micro- to obtain triazolone molecularly imprinted polymer Ball (MIPs).
As control, other than being added without template molecule, all steps are consistent with preparing for embodiment 1, obtain non-molecule Imprinted polymer microballoon (NIPs).
The resulting MIPs and NIPs 20mg of embodiment 1 is accurately weighed in 10mL centrifuge tube, being separately added into 5mL concentration is Triazolone-acetonitrile solution of 20mg/L.Staticadsorption experiment is carried out at 25 DEG C, and supernatant is taken to carry out UPLC inspection after the completion of absorption It surveys, it is as shown in table 1 that adsorption performance data is calculated:
The absorption property result of the imprinting factor of MIPs in 1 embodiment 1 of table
As shown in Table 1, the imprinting factor of triazolone molecularly imprinted polymer MIPs obtained in embodiment 1 is 2.413.
Fig. 1 is the electron-microscope scanning figure of MIPs obtained in embodiment 1;
Fig. 2 is the particle size distribution figure of MIPs obtained in embodiment 1;
As Fig. 1 and Fig. 2 it is found that the partial size of MIPs obtained in embodiment 1 is between 206nm~215nm, and it is distributed single One.
Fig. 3 is the Static Adsorption curve of MIPs obtained in embodiment 1;The combination Q of MIPs is with triazolone as shown in Figure 3 The increase of concentration and increase.QMIPsIt is consistently higher than QNIPs, this is because MIPs has specific adsorption site, both there is chemistry and inhaled It is attached and there are physical absorptions, and NIPs only has physical adsorption way, so MIPs has stronger adsorption capacity compared to NIPs.
Fig. 4 is spy of the MIPs and NIPs obtained in embodiment 1 to 9 kinds of triazole bactericidal agents and 2 kinds of non-triazole pesticides Opposite sex absorption figure;Fig. 4 shows that the polymer microballoon has good specific adsorption to most of triazole bactericidal agents.
Embodiment 2
Using MIPs obtained in embodiment 1 as solid phase extraction filler, be applied to triazolone in mark-on tobacco leaf, nitrile bacterium azoles, Tebuconazole, hexaconazole, olefin conversion, propiconazole, tricyclazole, glyoxalin and the detection of the Flusilazole rate of recovery.Detailed process are as follows:
1) 40 meshes are crossed after tobacco leaf control sample high-speed multifunctional being crushed crusher machine 1min, are then transferred to 50 DEG C of constant temperature It dries in vacuum oven to constant weight.The above-mentioned dry tobacco sample of several pieces 1g is weighed, is respectively placed in 10mL centrifuge tube, is added The residual mixed standard solution 1mL of 9 kinds of triazole bactericidal agent agricultures of various concentration, spiked levels are respectively 0.01,0.05,0.1,0.5 μ G/g, then vortex oscillation 5min mixes well it, and 50 DEG C of vacuum drying 2h are put into after being stored at room temperature overnight to get mark-on is arrived Tobacco sample.
2) 10mL acetonitrile solution is added into mark-on tobacco sample, supernatant is taken out in centrifugation after ultrasonic extraction 30min at 30 DEG C Liquid crosses 0.22 μm of filter membrane, filtrate is transferred in 50mL rotary evaporation bottle, wait rotate.Then by filter residue and the cigarette of centrifugation bottom of the tube Leaf extract remainder merges, and adds 5mL acetonitrile and carries out second of extraction (extraction conditions is with for the first time).Merge extract liquor twice, rotation Turn after being evaporated to dryness, is redissolved, be finally fitted into brown liquid chromatogram sample injection bottle with 1mL acetonitrile, it is to be detected.
3) filling of molecularly imprinted solid phase extraction column: accurately weighing the MIPs and NIPs of several pieces 100mg, and it is solid to be packed into 3mL (upper and lower ends place 0.45 μm of sieve plate) compacting is spare in phase extraction column, i.e., is prepared into MISPE column respectively (Molecularly Imprinted SolidPhase Extraction, MISPE) and NISPE column (Noimprinted SolidPhase Extraction,NISPE)。
4) 5mL methanol is added in extraction equipment and carries out pre-activate, then using 10mL acetonitrile as loading front activating;Using The acetonitrile prepared in step 2) redissolves sample loading;Using methanol: the solution 2mL of ultrapure water=8:1 (V/V) is eluted;Most Use methanol afterwards: the solution of acetic acid=9:1 (V/V) is eluted.Eluent is moved into 25mL eggplant-shape bottle, rotation is used after being evaporated 1mL acetonitrile solution redissolves, upper UPLC-MS/MS detection.
The rate of recovery the results are shown in Table 2, it can be found that in addition to Flusilazole, other 8 kinds of triazole bactericidal agents are in spiked levels Average recovery rate within the scope of 0.01~0.5 μ g/g is 70.14~105.43% (n=6), and the standard deviation repeatedly measured is 0.26~2.27%.Illustrate that this method favorable reproducibility, precision are high.In addition, using this micro- with triazolone molecular engram nanometer Ball is that the Solid Phase Extraction combination UPLC-MS/MS detection method of adsorbent carries out the residual content of 8 kinds of triazole bactericidal agent agricultures in tobacco leaf When detection, linear relationship is good (r >=0.9995) in a certain range.Method detection is limited to 4.82~11.97ng/mL, fixed Amount limit (LOQ) is 16.07~39.90ng/mL.The trace detection residual to triazole type agricultures a variety of in tobacco leaf is realized, the results are shown in Table 3。
2 recovery of standard addition of table and precision (n=6)
Standard curve, the range of linearity, related coefficient, detection line and the quantitative limit of 3 eight kinds of triazole bactericidal agents of table
Embodiment 3
0.2mmol nitrile bacterium azoles, 0.6mmol MAA and 55mL acetonitrile are sequentially added in 100mL pyrex bottle, are mixed Uniformly, the logical N of ultrasound at 30 DEG C210min is placed on self assembly 12h in 30 DEG C of constant temperature gas bath oscillators, and 30mg azo is then added Bis-isobutyronitrile (AIBN) and 3mmol ethyleneglycol dimethacrylate (EGDMA) are uniformly mixed, and lead to N210min is placed on 30 DEG C of perseverances Then tepidarium oscillator prepolymerization 3h is warming up to 55 DEG C with the rate of 1.2 DEG C/min, polymerize 20h.After polymerization, stand Supernatant is outwelled, is put after object to be polymerized is dry then with supercentrifuge (revolving speed 10000rpm) isolating polymer to room temperature Enter in Soxhlet extractor, use methanol: acetic acid=8:1 (V/V) is as eluant, eluent repetitive cycling eluted template molecule, until supernatant Until can't detect triazolone on UPLC.Again with methanol solution washing copolymer, until polymer is in neutrality, it then will polymerization Object is put into 40 DEG C of vacuum ovens dryings to constant weight, obtains triazolone molecular blotting polymer microsphere MIPs.
As control, other than being added without template molecule, all steps are consistent with preparing for embodiment 1, obtain non-molecule Imprinted polymer NIPs.
The MIPs that embodiment 2 obtains is accurately weighed, in 10mL centrifuge tube, be separately added into 5mL concentration is NIPs 20mg Triazolone-acetonitrile solution of 20mg/L.Staticadsorption experiment is carried out at 25 DEG C, and supernatant is taken to carry out UPLC inspection after the completion of absorption It surveys, it is as shown in table 4 that adsorption performance data is calculated:
The imprinting factor for the MIPs that 4 embodiment 2 of table obtains
As shown in Table 4, the imprinting factor for the MIPs that embodiment 3 obtains is 2.386.
Fig. 5 is the particle size distribution figure of MIPs obtained in embodiment 3.Polyalcohol microspherulite diameter concentrates on as shown in Figure 5 210nm~220nm.
Embodiment 4
0.2mmol triazolone, 0.8mmol MAA and 50mL acetonitrile are sequentially added in 100mL pyrex bottle, are mixed Uniformly, the logical N of ultrasound at 30 DEG C210min is placed on self assembly 12h in 30 DEG C of constant temperature gas bath oscillators, and 30mg azo is then added Bis-isobutyronitrile AIBN and 2.4mmol diol dimethacrylate EGDMA is uniformly mixed, and leads to N210min is placed on 30 DEG C of constant temperature Then temperature is slowly increased to 60 DEG C by water-bath oscillator prepolymerization 4h, polymerization is for 24 hours.After polymerization, standing to room temperature, then With supercentrifuge (revolving speed 15000rpm) isolating polymer, supernatant is outwelled, is put into Soxhlet extraction after object to be polymerized is dry In device, use methanol: acetic acid=9:1 (V/V) is as eluant, eluent repetitive cycling eluted template molecule, until supernatant is examined on UPLC Until not detecting triazolone.Then polymer is put into 50 DEG C until polymer is in neutrality by again with methanol solution washing copolymer Vacuum oven is dry to constant weight, obtains triazolone molecularly imprinted polymer MIPs.
As control, other than being added without template molecule, all steps are consistent with preparing for embodiment 1, obtain non-molecule Imprinted polymer NIPs.
MIPs and NIPs 20mg obtained in embodiment 3 is accurately weighed in 10mL centrifuge tube, is separately added into 5mL concentration For triazolone-acetonitrile solution of 20mg/L.Staticadsorption experiment is carried out at 25 DEG C, and supernatant is taken to carry out UPLC inspection after the completion of absorption It surveys, it is as shown in table 5 that adsorption performance data is calculated:
The imprinting factor for the MIPs that 5 embodiment 5 of table obtains
As shown in Table 5, the imprinting factor for the MIPs that embodiment 4 obtains is 2.412.
Fig. 6 is the particle size distribution figure of MIPs obtained in embodiment 4.(polyalcohol microspherulite diameter concentrates on as shown in Figure 6 202nm~210nm.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (12)

1. a kind of preparation method of triazole type molecular blotting polymer microsphere, comprising the following steps:
1) it is carried out after ultrasound under oxygen-free environment from group after mixing triazole class compounds template molecule, function monomer and pore-foaming agent Dress, obtains self assembly mixed liquor;
2) pre-polymerization is carried out after mixing the self assembly mixed liquor that step 1) obtains with acrylic ester cross-linking agent, azo-initiator It closes, obtains prepolymerization liquid;The prepolymerized temperature is 20~40 DEG C;
3) polymerization reaction is being carried out after the prepolymerization liquid heating obtained step 2), is obtaining polymer;The speed of the heating Rate is 0.5~1.2 DEG C/min, and the temperature of the polymerization reaction is 35~60 DEG C;
4) the triazole class compounds template molecule elution in the polymer for obtaining step 3) obtains the polymerization of triazole type molecular engram Object microballoon;
It is carried out under the conditions of the polymerization reaction earthquake in prepolymerization and the step 2) in the step 1).
2. preparation method according to claim 1, which is characterized in that triazole class compounds template molecule in the step 1) For triazolone, nitrile bacterium azoles, Tebuconazole, hexaconazole, olefin conversion, propiconazole, tricyclazole, glyoxalin or Flusilazole.
3. preparation method according to claim 1, which is characterized in that function monomer is acrylic acid, α-in the step 1) Methacrylic acid, trifluoromethyl acrylate or acrylamide.
4. preparation method according to claim 1, which is characterized in that pore-foaming agent is chloroform, toluene, second in the step 1) Nitrile or methylene chloride.
5. preparation method described in any one according to claim 1~4, which is characterized in that triazole type in the step 1) The amount ratio for closing object template molecule, function monomer and pore-foaming agent is 1mol:2~6mol:30~60ml.
6. preparation method according to claim 1, which is characterized in that the temperature of self assembly is 4~30 in the step 1) DEG C, the time of the self assembly is 2~12h.
7. preparation method according to claim 1, which is characterized in that acrylic ester cross-linking agent is second in the step 2) Diol dimethacrylate or trimethylol-propane trimethacrylate.
8. preparation method according to claim 1, which is characterized in that azo-initiator is azo two in the step 2) Isobutyronitrile or azobisisoheptonitrile.
9. according to claim 1, preparation method described in 7 or 8, which is characterized in that esters of acrylic acid is crosslinked in the step 2) The mass ratio of agent, azo-initiator and triazole class compounds template molecule is 4~20:1:1.
10. preparation method according to claim 1, which is characterized in that the concussion in the step 2) and the step 3) Condition is provided by constant temperature oscillator, and the revolving speed of the isothermal vibration device is 50~150rpm.
11. the triazole type molecular blotting polymer microsphere that method described in claim 1~10 any one is prepared, described The particle size range of polymer microballoon is 190~220nm, and the size distribution of the polymer microballoon is single, average grain diameter 198nm ~203nm.
12. triazole type molecular blotting polymer microsphere described in claim 11 is in the residual trace detection of triazole bactericidal agent agriculture Using.
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